www.sensirion.com

Version 1.0 – July 2020 – D1

5/19

2 Specifications

2.1 Electrical Specifications

Table 2 lists electrical specifications of the SGP40. Default conditions of 25 °C and 3.3 V supply voltage apply to values in the

Parameter

Symbol

Values

Unit

Comments

Min.

Typ.

Max.

Supply voltage, hotplate supply

1.7

3.3

3.6

V

Minimal voltage must be guaranteed also for the

maximum supply current specified in this table.

power supply, see Figure 5.

Idle current

–

34

105

A

The idle mode is activated after power-up, after

calling the sgp40_heater_off command, or after

a soft reset.

–

3.5

4.0

mA

Average current consumption while the sensor

–

2.6

3.0

mA

Average current consumption while the sensor

Communication

–

Table 2 Electrical specifications.

2.2 Timing Specifications

Timings in Table 3 refer to the power up and reset of the ASIC part and do not reflect the usefulness of the readings.

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Power-up time

After hard reset,

–

0.4

0.6

ms

Soft reset time

After soft reset

–

0.4

0.6

ms

SCL clock frequency

–

–

–

400

kHz

Table 3 System timing specifications.

2.3 Recommended Operating and Storage Conditions

Gas Sensing Specifications as detailed in Table 1 are guaranteed only when the sensor is stored and operated under the

recommended conditions as specified in Table 4 and displayed in Figure 3 and Figure 4. Prolonged exposure to conditions

outside these conditions may reduce sensor performance. The sensor must not be exposed towards condensing conditions (i.e.,

>90 % relative humidity) at any time.

9

http://www.nxp.com/documents/user_manual/UM10204.pdf

10

Any supply voltage as defined by the min./max. range may be used for continuous operation of the sensor. The typical value specifies the supply voltage at which outgoing

quality control is performed.

11

mode.